Python default version on Ubuntu 18.04 LTS
The default version of Python on Ubuntu 18.04 is Python 2, that is, if you run“python”command in the Terminal, the Python 2 engine will be executed. Even if you have installed Python 3.5 or higher version.
A solution to change Python3 as the default version
sudo update-alternatives --install /usr/bin/python python /usr/bin python3 1
For Visual Studio Code
Just use command code to open Visual Studio Code from Terminal
For example: code path/of/file
For Sublime Text editor
Just use command subl to open Sublime Text editor from Terminal
For example: subl path/of/file
為了加速 VM 的執行速度，VM App 以及 Virtual Disk 都是存放在 SSD，
最近 SSD 的空間開始吃緊了，所以想在 Ubuntu 18.04 上再掛接 (Mount)
顆實體硬碟。
Steps:
1: Power off your VM on VMware Workstation
2: Select your VM and edit virtual machine settings
3: on "Hardware" Tab, Select "Add..."
4: Select "Add -> Hard disk"
5. Select "Use a Physical Disk"
6. Select a Physical Disk ( a partition or entire disk, as required )
在這裡，我是掛接 EXT4 Partition， 在 Windows 10 的系統下是不會使用的，
若是你要掛接的 Partition 在原系統 (Host) 會使用到，
就請參考底下連接 ( VMWare 原始說明 )。
For this error, please try below 3 possible solutions
# Possible Solution 1
You may not install Python yet, please follow below command to install it
sudo apt install python3.7
# Possible Solution 2
You have installed Python3, but "python" command is not equal to "python3"
Please follow below command to let them equal (Ubuntu 20.04)
sudo apt install python-is-python3
# Possible Solution 3
Symptom is same as "Possible Solution 2", but OS is Ubuntu 16.04.
Please follow below commands to create a symlink
whereis python3
run above command to get Python and Python3 installed directory\ies
sudo ln -s /usr/bin/python3 /usr/bin/python
run above command to create a symlink, the /usr/bin/python3 and /usr/bin/python are examples, please instead by the result of "whereis python3" command
